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管井腐蚀
 管井腐蚀
tech. corrosion of casing well
| 程度
 程度
gen. level
econ. measure
hydroel.st. extent
met. plane; rate; scale
progr. stage
tech. degree
 程度 ^b1
gen. degree

to phrases
管井腐蚀
tech. corrosion of casing well
管井腐蚀: 2 phrases in 1 subject
Technology2